When is this term used?

It is used to describe a pattern where sensitivity to cold and coldness in the hands, feet, or lower abdomen are accompanied by a decline in bodily functions, such as decreased energy, loose stools, or frequent urination.

Is it the same as cold syndrome (naeng-jeung)?

Cold syndrome (naeng-jeung) refers to the sensation of coldness felt by the patient, whereas Yang deficiency is a pattern identification (byeon-jeung) that groups several changes, including those symptoms. Not everyone who feels cold has Yang deficiency.

What is evaluated during the medical consultation?

We check the affected cold areas and timing, sensitivity to cold, digestion, bowel movements, urination, fatigue, and sleep status together.

Can it be determined by lifestyle habits alone?

Yang deficiency is not determined solely by the fact that someone prefers warmth or is sensitive to cold. During the medical evaluation, we check recent weight, muscle mass, anemia, thyroid function, and medications to see if multiple functional declines are present.

Yang deficiency is not the same as having a low body temperature or a constitution sensitive to cold.

In Korean medicine, Yang deficiency is viewed as a pattern where the function to warm the body and maintain activity is insufficient. We examine whether coldness in the hands, feet, and abdomen and sensitivity to cold appear alongside fatigue, loose stools, and changes in urination. It is not determined by a preference for warmth alone.

Commonly confused terms and their differences: A cold sensation is a symptom, 'Han-jeung' is a broad pattern identification in the direction of coldness, and Yang deficiency further emphasizes functional decline and lack of recovery within that. Hypothyroidism, anemia, Raynaud's, and neurological issues are separate conditions confirmed through tests and examinations; Yang deficiency does not replace these diagnoses.
Information to record before your visit: Please record the areas and times of cold sensation, recovery after warming, actual body temperature, and skin color. Also, record fatigue after activity, appetite, bowel movements, urination, edema, weight, menstrual changes, and any new medications. If you have recent thyroid, complete blood count (CBC), or kidney function test results, please prepare the dates and values.
Scope of this material: WHO data was used to define the scope of traditional medicine terms for Yang deficiency and Han-jeung, while NIDDK and MedlinePlus data were used to distinguish the medical causes of hypothyroidism and cold sensitivity. The explanation of Yang deficiency does not guarantee a disease diagnosis or the efficacy of restorative herbal medicine. Decreased consciousness, difficulty breathing, sudden edema, or abnormal blood flow on one side of the body require immediate medical evaluation.

Official References

Medical staff who wrote and reviewed this article

Choi Yeon-seung

Chief Director of Baekrokdam Korean Medicine Clinic

The meaning of Yang deficiency, the scope of differential diagnosis, and patient guidance expressions have been reviewed. The last review date was August 25, 2026.

Graduated from Kyung Hee University College of Korean Medicine
Providing Korean medicine treatment since 2010
Symptom treatment from the perspective of heat-cold balance and constitution

Check medical evaluation criteria for my symptoms View full profile

Check the guides where these terms are used

Symptom and Disease GuideCold Hands and Feet

Symptom and Disease GuideAbdominal Cold Syndrome

Symptom and Disease GuideHypothyroidism

Heat and Cold ColumnReasons why the body feels cold, and Korean medicine treatment when coldness in the hands, feet, and abdomen is accompanied by fatigue

This explains how to distinguish the reasons for a cold body from thyroid issues, anemia, and Raynaud's phenomenon, and describes how Korean herbal medicine and acupuncture treatments vary when coldness in the hands, feet, and abdomen is accompanied by poor digestion, fatigue, or edema.

Heat and Cold ColumnWhy is my abdomen cold? Is it simply a matter of blood circulation?

When symptoms of cold hands, feet, and abdomen persist, we look beyond simple lack of circulation to examine the causes and characteristics of coldness from a Korean medicine perspective and provide a checklist for self-assessment.

Heat and Cold ColumnDo you have severe cold sensitivity in your hands and feet and feel that circulation agents alone are not enough?

Beyond simple blood circulation issues, we analyze the cause of cold sensitivity in hands and feet from the perspective of the body's coldness (Han) and provide criteria for self-checking.

Medical GuideWhen my hands and feet are cold and chilly, should I only think of it as cold hypersensitivity (Sujok Naengjeung)?

Symptoms of cold hands and feet vary, even under the single term 'cold hypersensitivity' (sujok-naengjeung). By distinguishing between color changes, differences between sides, numbness, and general fatigue, and by examining digestion, sleep, and lower abdominal coldness when tests show no clear cause, we can determine if Korean medicine treatment is appropriate.

Medical GuideWhat should be checked when the entire body feels excessively hot or cold?

Sensitivity to heat or cold throughout the body can be caused by various factors, including the thyroid, medication, anemia, and menopause. If discomfort persists despite no major abnormalities in tests, we can determine the direction of Korean medicine treatment by analyzing systemic heat/cold tendencies along with sleep, digestion, sweat, and fatigue.

Comparison of similar terms

Korean Medicine ConceptHan-jeung

Cold syndrome (Han-jeung) refers to a tendency where various body signals lean toward a cold state. It is not a term used to describe diseases such as anemia, hypothyroidism, or vascular and nerve problems.

Korean Medicine ConceptKidney Yang Deficiency

Kidney Yang Deficiency is a category in Korean medicine determined by checking whether cold sensations in the lower back and lower body, sensitivity to cold, decreased energy, and changes in urination appear together. It is not the same as an abnormality in kidney function tests.

Korean Medicine ConceptSpleen Yang Deficiency

Spleen Yang Deficiency is a Korean medicine classification determined by examining whether abdominal coldness, slow digestion, loose stools, or post-meal fatigue appear together. It is not the same as an anatomical spleen disease.

Medical TerminologyCold-Heat Pattern Identification

Pattern identification (Byeon-jeung) is the process of examining the location and timing of heat or cold sensations, as well as accompanying patterns such as sleep, digestion, and sweating, through medical interviews and physical examinations. It is not a substitute for medical tests or diagnoses.